If you're not proud or embarrassed by it then I don't understand why it is an issue? If you miscommunicate something or don't get your point across, just try again, or apologize, and chalk it up to a learning experience.

If you think your writing could use improvement, then write your comment and let it sit for a few minutes before re-reading it and the comment you are replying to, make your edits and then post it. It will give your brain time to reset and maybe spot something you didn't earlier.